Razor-stropping machine.



s. KANNER. RAZOR STROPPING MACHINE.

APPLICATION FILED SEPT. 24, 1912.

1,097,027, Patepted May 19, 1914.

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SAMUEL KAN'NER, OF NEW YORK, N. Y.

RAZOR-STROPPING MACHINE.

Specification of Letters Patent.

Patented May 19, 1914.

Application filed September 24, 1912. Serial No. 722,003.

To all whom it may concern:

Be it known that I, SAMUEL KANNER, a citizen of the United States, and aresident of New York city, in the county of New York and State of NewYork, have invented certain new and useful Improvements inItazor-Stropping Machines, of which the following is a specification.

The invention relates to improvements in razor stropping machines of theclass comprising a frame through which a strop is threaded and is to bealternately pulled at its ends, and a blade holder located between thereaches of the strop and adapted to alternately carry the blade theretoas said reaches are alternately pulled outwardly in line with theirlength, the blade moving to one reach as said reach is pulled outwardlyand to the other reach when it is pulled outwardly; and said inventionconsists in the novel features and structure, hereinafter described, andparticularly pointed out in the claims.

The object of the invention is to provide an efficient stropping machineof the class referred to, and more particularly a strepping machinewhich is durable, simple in construction, efficient in action, andcapable of manufacture at minimum expense.

The invention will be fully understood from the detailed descriptionhereinafter presented, reference being had to the accom panyingdrawings, in which:

Figure 1 is a side elevation of a stropping machine embodying myinvention, the strop being shown in section and partly broken away, andthe loop by which the stropping machine may be suspended also beingpartly broken away; Fig. 2 is a vertical transverse section through thesame on the dotted line 22 of Fig. '1; Fig. 3 is a vertical transversesection through the same on the dotted line 3-3 of Fig. 1; Fig. 4: is anenlarged vertical longitudinal section, partly broken away, of themachine taken on the dotted line l 1 of Fig. 2, and Fig. 5 is a detachedhorizontal section through a portion of the upper part of the machinetaken about on the dotted line 5 of F ig. 41.

In the drawings, 10 designates the general frame of the machine, 11 thestrop, 12 a rockable friction roller or frame journaled between thesides 13 of the main frame 10 and over whichthe strop is folded, let apivotally mounted blade holder, 15 a blade shown as held by said holder,and 16 a loop of usual character by which the machine may be suspendedfrom or connected with a restrammg hook or the like. The general frame10 will preferably be formed in one mtegral piece of sheet metal withthe sides 13 and top 17, the latter constituting a reasonably narrowupwardly arched bar connectlng the sides 13 and forming within it achamber of substantially semi-cylindrispring. The end portions of thespring 19 are, in the preferred operative condition of the machine,flexed upwardly, as illustrated n Fig. 4,, and the purpose of the spring19 1s, as hereinafter more fully explained, to

automatically and instantly move the blade 15 from the strop when thepulling strain is relieved therefrom and to automatically retain theblade holder in a central initial position, shown by full lines in Fig.3, ready to receive or release a razor blade. The top 17 is alsopreferably integrally formed with an eye 21 to receive the usual loop16. The

sides 13 of the main frame 10 are open at their central portions, as at22, and at their lower ends said sides 13 are connected by parallel rods23 of known character.

The blade holder 14: is formed with converging jaws 2% to receive theblade 15, as usual, and within the space formed between the jaws 2 1 isconfined the usual spring 25 for pressing against the back edge of theblade and forcing its sharpened edge firmly through the opening betweenthe lower ends of said jaws. In accordance with my invention the bladeholder 14 is formed at its ends with the upwardly extending plates 26which lie close against the inner faces of the sides 13 of the mainframe 10 and are .pivotally supported at their upper ends on ence by thepivot pins 30 which pass through said slots and support the rockableframe 12, and the openings 29 are provided to receive studs 31 whichproject from the upper edges of the ends of the said frame 12 and actduring the rocking movements of said frame to effect the properoscillatory movements of the blade holder l-ft. The plates 26 are rigidwith the jaws of the blade holder and constitute in elfect a poition ofsaid holder, and hence with every movement imparted to the said platesby the rockable frame 12, such movement will be communicated to the jaws21 holding the blade 15. The upper ends of the plates 26 are squaredoff, as shown in Figs. 2, 3, at and 5, and at their corners are bentinwardly, as at 32, thereby with the upper surfaces of said ends formingsubstantial bearing surfaces againstwhich the outer ends of the spring19 press, as more clearly indicated in Fig. 1. The action of the ends ofthe spring 19 (each end constituting in effect a separate spring), isnormally to hold the blade holder 14: in a central position between thereaches of the st-rop 11 and to return said blade holder to suchposition whenever, during the operation of the strop, said holder ismoved therefrom. The spring 19 is substantially concealed by the top 17of the main frame 10, and it is a broad spring extending between thelower edges of the sides of said top, thereby closing the bottom of thelatter. The spring 19 being of very durable character is not at alllikely to become broken or otherwise impaired during the use of themachine, but on the contrary is well calculated to maintain itsefliciency and to properly act against the blade holder. lVhen the bladeholder laiis moved on its pivots 2'7 to one side or the other, theplates 26 will turn their corresponding corner portions 32upwardlyagainst the spring and thereby operate to more greatly flex the same,and when the pull on the reach of the strop which effected the movementof the blade holder is released, the spring, acting against said cornersof said plates 26, will .move the blade holder to its central posi tion.In Fig. 3 I illustrate the blade holder 14 as having been swung to theleft, said holder taking this position when the left hand reach of thestrop 11 is pulled outwardly. IV hen the right hand reach of the strep11 is pulled outwardly the blade holder will take a position adjacent tothat reach of the strop so that the outwardly moving reach may movealong the edge of the blade 15.

ported upon the pins 30 which extend through the sides 13 of the mainframe 10 and through the slots 28 of the plates 26 and into and throughthe ends of the frame 12, as illustrated in Fig. a.

In the employment of the device hereinbefore described, the reaches ofthe strop 11 are alternately pulled, in a manner well known in this art,and as the strop slides I under pressure over the rockable frame 12 itturns the latter in the direction of the pull on the strop, said frame12 turning in one direction when one reach of the strop is pulled andimmediately turning in the opposite direction when the other reach ofthe strop is pulled. In this manner the frame 12 is caused to rock backand forth on its pivots or trunnions 30, and during its movements saidframe imparts through the studs or fingers 31 and plates 26, asimultaneous movement to the blade holder 1%.

One of the main purposes of the invention ;is to provide for theeflicient movement of the holder 11'- and blade 15 toward the reach of astrop pulled outwardly and a like movement of the blade from said reachthe monient said reach has concluded its movement and the other reach ofthe strop is to be pulled outwardly, so that the blade may not cut thestrop, and this purpose is cfiiciently accomplisned by the means I haveprovided for actuating the holder from the independent moving the holder1st in a direction from the reach ofthe strop the moment the pull onsaid reach has ceased. pose of the invention is to provide a very Afurther purdurable stropping machine or one capable of withstandingcontinued and rather rough usage without becoming impaired, and this:purpose is accomplished by the particular construction and relativearrangement of parts hereinbefore specifically ldentified.

The spring 19 is of durable character and has an eflicient bearingactionagainst the solid ends of the plates 26. I prefer that the spring 19constitute in effect the two sirings, one for eachof the plates 26, butI do not desire to limit my invention to two springs or to one baracting as a spring ateach end, since if one end of the spring 19 wereomitted, the other end thereof pressing down 011 the upper end of theplate 26 adjacent thereto, would operate on the blade holder 14 andserve to return said holder to its central position after each movementof the same therefrom. I regard it as desirable, however, to apply thespring pressure on the upper ends of both of the plates 26, sincethereby a more durable and mechanically desirable operation is secured.

What I claim as my invention and desire to secure by Letters-Patent, is:r

1. A stropping machine comprising a main frame having parallel sides anda top connecting said sides, a rockable frame pivotally mounted betweensaid sides, a strop folded over and adapted when pulled at either end toactuate said frame, a bladeholder having end plates extending upwardlyalong the ends of and above said rockable frame and between said frameand the sides of said main frame and at their upper ends being pivotallysecured to said sides, and spring means at said top bearing on the upperends of said plates for normally maintaining the blade-holder centrallybetween the reaches of the strop, said rockable frame and said platesbelow their upper ends having interengaging means for enabling saidframe to actuate the bladeholder.

2. A stropping machine comprising a main frame having parallel sides andatop connecting said sides, a rockabale frame pivotally mounted betweensaid sides, a st-rop folded over and adapted when pulled at either endto actuate said frame, a blade holder having end plates extendingupwardly along the ends of and above said rockable frame and betweensaid frame and the sides of said main frame and at their upper endsbeing pivotally secured to said sides, and spring means at said topbearing on the upper ends of said plates for normally maintaining theblade-holder centrally between the reaches of the strop, said rockableframe and said plates below their upper ends having interengaging meansfor enabling said frame to actuate the blade holder, and said plates attheir upper ends being squared off and bent inwardly at their cornersand said spring means being a leaf spring engaging with its fiat facesaid upper ends.

3. A stropping machine comprising a roekable frame, a strop folded overand adapted when pulled at either end to actuspring secured to the topof the frame of the machine and flexed at its ends to press downwardlyon the upper ends of said plates above said pins.

4. A stropping machine comprising a mainframe having parallel sides anda top connecting said sides, a rockable frame pivotally mounted betweensaid sides, a strop folded over and adapted when pulled at either end toactuate said frame, a bladeholder having end plates extending upwardlyalong the ends of and above said rockable frame and between said frameand the sides of said main frame and at their upper ends being pivotallysecured to said sides, and spring means at said top bearing on the upperends of said plates for normally maintaining the blade-holder centrallybetween the reaches of the strop, said rockable frame and said endplates respectively having, below the pivots at the upper ends of saidplates, fingers and openings loosely receiving the same for enablingsaid frame to actuate the blade-holder. r

Signed at New York city, inthe county of New York and State of New York,this 23rd day of September, A. D, 1912.

SAMUEL KANNER.

Copies of this patent may be obtained for five cents each, by'addressingthe Commissioner of Patents, Washington, D. G.

